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authorDimitry Andric <dim@FreeBSD.org>2024-07-27 23:34:35 +0000
committerDimitry Andric <dim@FreeBSD.org>2024-10-23 18:26:01 +0000
commit0fca6ea1d4eea4c934cfff25ac9ee8ad6fe95583 (patch)
tree6cf5ab1f05330c6773b1f3f64799d56a9c7a1faa /contrib/llvm-project/libcxx/include/__algorithm/ranges_contains_subrange.h
parent6b9f7133aba44189d9625c352bc2c2a59baf18ef (diff)
parentac9a064cb179f3425b310fa2847f8764ac970a4d (diff)
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/ranges_contains_subrange.h')
-rw-r--r--contrib/llvm-project/libcxx/include/__algorithm/ranges_contains_subrange.h97
1 files changed, 97 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/ranges_contains_subrange.h b/contrib/llvm-project/libcxx/include/__algorithm/ranges_contains_subrange.h
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+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H
+#define _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H
+
+#include <__algorithm/ranges_search.h>
+#include <__config>
+#include <__functional/identity.h>
+#include <__functional/ranges_operations.h>
+#include <__functional/reference_wrapper.h>
+#include <__iterator/concepts.h>
+#include <__iterator/indirectly_comparable.h>
+#include <__iterator/projected.h>
+#include <__ranges/access.h>
+#include <__ranges/concepts.h>
+#include <__ranges/size.h>
+#include <__ranges/subrange.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+# pragma GCC system_header
+#endif
+
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
+#if _LIBCPP_STD_VER >= 23
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace ranges {
+namespace __contains_subrange {
+struct __fn {
+ template <forward_iterator _Iter1,
+ sentinel_for<_Iter1> _Sent1,
+ forward_iterator _Iter2,
+ sentinel_for<_Iter2> _Sent2,
+ class _Pred = ranges::equal_to,
+ class _Proj1 = identity,
+ class _Proj2 = identity>
+ requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static operator()(
+ _Iter1 __first1,
+ _Sent1 __last1,
+ _Iter2 __first2,
+ _Sent2 __last2,
+ _Pred __pred = {},
+ _Proj1 __proj1 = {},
+ _Proj2 __proj2 = {}) {
+ if (__first2 == __last2)
+ return true;
+
+ auto __ret = ranges::search(
+ std::move(__first1), __last1, std::move(__first2), __last2, __pred, std::ref(__proj1), std::ref(__proj2));
+ return __ret.empty() == false;
+ }
+
+ template <forward_range _Range1,
+ forward_range _Range2,
+ class _Pred = ranges::equal_to,
+ class _Proj1 = identity,
+ class _Proj2 = identity>
+ requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>
+ [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static
+ operator()(_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) {
+ if constexpr (sized_range<_Range2>) {
+ if (ranges::size(__range2) == 0)
+ return true;
+ } else {
+ if (ranges::begin(__range2) == ranges::end(__range2))
+ return true;
+ }
+
+ auto __ret = ranges::search(__range1, __range2, __pred, std::ref(__proj1), std::ref(__proj2));
+ return __ret.empty() == false;
+ }
+};
+} // namespace __contains_subrange
+
+inline namespace __cpo {
+inline constexpr auto contains_subrange = __contains_subrange::__fn{};
+} // namespace __cpo
+} // namespace ranges
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP_STD_VER >= 23
+
+_LIBCPP_POP_MACROS
+
+#endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H